package Echolot::Conf; # (c) 2002 Peter Palfrader # $Id: Conf.pm,v 1.9 2002/07/02 18:03:55 weasel Exp $ # =pod =head1 Name Echolot::Conf - remailer Configuration/Capabilities =head1 DESCRIPTION This package provides functions for requesting, parsing, and analyzing remailer-conf and remailer-key replies. =cut use strict; use warnings; use Carp qw{cluck}; use GnuPG::Interface; use IO::Handle; sub send_requests() { Echolot::Globals::get()->{'storage'}->delay_commit(); for my $remailer (Echolot::Globals::get()->{'storage'}->get_addresses()) { next unless ($remailer->{'status'} eq 'active'); next unless ($remailer->{'fetch'}); print "Sending requests to ".$remailer->{'address'}."\n" if Echolot::Config::get()->{'verbose'}; for my $type (qw{conf key help stats}) { Echolot::Tools::send_message( 'To' => $remailer->{'address'}, 'Subject' => 'remailer-'.$type, 'Token' => $type.'.'.$remailer->{'id'}) }; Echolot::Globals::get()->{'storage'}->decrease_ttl($remailer->{'address'}); }; Echolot::Globals::get()->{'storage'}->enable_commit(); }; sub remailer_conf($$$) { my ($conf, $token, $time) = @_; my ($id) = $token =~ /^conf\.(\d+)$/; (defined $id) or cluck ("Returned token '$token' has no id at all"), return 0; cluck("Could not find id in token '$token'"), return 0 unless defined $id; my ($remailer_type) = ($conf =~ /^\s*Remailer-Type:\s* (.*?) \s*$/imx); cluck("No remailer type found in remailer_conf from '$token'"), return 0 unless defined $remailer_type; my ($remailer_caps) = ($conf =~ /^\s*( \$remailer{".*"} \s*=\s* "<.*@.*>.*"; )\s*$/imx); cluck("No remailer caps found in remailer_conf from '$token'"), return 0 unless defined $remailer_caps; my ($remailer_nick, $remailer_address) = ($remailer_caps =~ /^\s* \$remailer{"(.*)"} \s*=\s* "<(.*@.*)>.*"; \s*$/ix); cluck("No remailer nick found in remailer_caps from '$token': '$remailer_caps'"), return 0 unless defined $remailer_nick; cluck("No remailer address found in remailer_caps from '$token': '$remailer_caps'"), return 0 unless defined $remailer_address; my $remailer = Echolot::Globals::get()->{'storage'}->get_address_by_id($id); cluck("No remailer found for id '$id'"), return 0 unless defined $remailer; if ($remailer->{'address'} ne $remailer_address) { # Address mismatch -> Ignore reply and add $remailer_address to prospective addresses cluck("Remailer address mismatch $remailer->{'address'} vs $remailer_address. Adding latter to prospective remailers."); Echolot::Globals::get()->{'storage'}->add_prospective_address($remailer_address, 'self-capsstring-conf', $remailer_address); } else { Echolot::Globals::get()->{'storage'}->restore_ttl( $remailer->{'address'} ); Echolot::Globals::get()->{'storage'}->set_caps($remailer_type, $remailer_caps, $remailer_nick, $remailer_address, $time); # if remailer is cpunk and not pgponly if (($remailer_caps =~ /\bcpunk\b/) && !($remailer_caps =~ /\bpgponly\b/)) { Echolot::Globals::get()->{'storage'}->set_key( 'cpunk-clear', $remailer_nick, $remailer->{'address'}, 'N/A', 'none', 'N/A', 'N/A', 'N/A', $time); } } # Fetch prospective remailers from reliable's remailer-conf reply: my @lines = split /\r?\n/, $conf; while (@lines) { my $head = $lines[0]; chomp $head; shift @lines; last if ($head eq 'SUPPORTED CPUNK (TYPE I) REMAILERS'); }; while (@lines) { my $head = $lines[0]; chomp $head; shift @lines; last unless ($head =~ /<(.*?@.*?)>/); Echolot::Globals::get()->{'storage'}->add_prospective_address($1, 'reliable-caps-reply-type1', $remailer_address); }; while (@lines) { my $head = $lines[0]; chomp $head; shift @lines; last if ($head eq 'SUPPORTED MIXMASTER (TYPE II) REMAILERS'); }; while (@lines) { my $head = $lines[0]; chomp $head; last unless ($head =~ /\s(.*?@.*?)\s/); shift @lines; Echolot::Globals::get()->{'storage'}->add_prospective_address($1, 'reliable-caps-reply-type2', $remailer_address); }; return 1; }; sub parse_mix_key($$$) { my ($reply, $time, $remailer) = @_; # -----Begin Mix Key----- # 7f6d997678b19ccac110f6e669143126 # 258 # AASyedeKiP1/UKyfrBz2K6gIhv4jfXIaHo8dGmwD # KqkG3DwytgSySSY3wYm0foT7KvEnkG2aTi/uJva/ # gymE+tsuM8l8iY1FOiXwHWLDdyUBPbrLjRkgm7GD # Y7ogSjPhVLeMpzkSyO/ryeUfLZskBUBL0LxjLInB # YBR3o6p/RiT0EQAAAAAAAAAAAAAAAAAAAAAAAAAA # AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA # AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA # AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA # AAAAAAAAAAAAAAAAAAAAAQAB # -----End Mix Key----- my %mixmasters; # rot26 rot26@mix.uucico.de 7f6d997678b19ccac110f6e669143126 2.9b33 MC my @mix_confs = ($reply =~ /^[a-z0-9]+ \s+ \S+\@\S+ \s+ [0-9a-f]{32} (?:\s+ \S+ \s+ \S+)?/xmg); my @mix_keys = ($reply =~ /^-----Begin \s Mix \s Key-----\r?\n [0-9a-f]{32}\r?\n \d+\r?\n (?:[a-zA-Z0-9+\/]*\r?\n)+ -----End \s Mix \s Key-----$/xmg ); for (@mix_confs) { my ($nick, $address, $keyid, $version, $caps) = /^([a-z0-9]+) \s+ (\S+@\S+) \s+ ([0-9a-f]{32}) (?:(\S+) \s+ (\S+))?/x; $mixmasters{$keyid} = { nick => $nick, address => $address, version => $version, caps => $caps, summary => $_ }; }; for (@mix_keys) { my ($keyid) = /^-----Begin \s Mix \s Key-----\r?\n ([0-9a-f]{32})\r?\n \d+\r?\n (?:[a-zA-Z0-9+\/]*\r?\n)+ -----End \s Mix \s Key-----$/xmg; $mixmasters{$keyid}->{'key'} = $_; }; for my $keyid (keys %mixmasters) { my $remailer_address = $mixmasters{$keyid}->{'address'}; (defined $mixmasters{$keyid}->{'nick'} && ! defined $mixmasters{$keyid}->{'key'}) and cluck("Mixmaster key header without key in reply from $remailer_address"), next; (! defined $mixmasters{$keyid}->{'nick'} && defined $mixmasters{$keyid}->{'key'}) and cluck("Mixmaster key without key header in reply from $remailer_address"), next; if ($remailer->{'address'} ne $remailer_address) { # Address mismatch -> Ignore reply and add $remailer_address to prospective addresses cluck("Remailer address mismatch $remailer->{'address'} vs $remailer_address. Adding latter to prospective remailers."); Echolot::Globals::get()->{'storage'}->add_prospective_address($remailer_address, 'self-capsstring-key', $remailer_address); } else { Echolot::Globals::get()->{'storage'}->restore_ttl( $remailer->{'address'} ); Echolot::Globals::get()->{'storage'}->set_key( 'mix', $mixmasters{$keyid}->{'nick'}, $mixmasters{$keyid}->{'address'}, $mixmasters{$keyid}->{'key'}, $keyid, $mixmasters{$keyid}->{'version'}, $mixmasters{$keyid}->{'caps'}, $mixmasters{$keyid}->{'summary'}, $time); } }; return 1; }; sub parse_cpunk_key($$$) { my ($reply, $time, $remailer) = @_; my $GnuPG = new GnuPG::Interface; $GnuPG->options->hash_init( homedir => Echolot::Config::get()->{'gnupghome'} ); $GnuPG->options->meta_interactive( 0 ); my %cypherpunk; my @pgp_keys = ($reply =~ /^-----BEGIN \s PGP \s PUBLIC \s KEY \s BLOCK-----\r?\n (?:.+\r?\n)* \r?\n (?:[a-zA-Z0-9+\/=]*\r?\n)+ -----END \s PGP \s PUBLIC \s KEY \s BLOCK-----$/xmg ); for my $key (@pgp_keys) { my ( $stdin_fh, $stdout_fh, $stderr_fh, $status_fh ) = ( IO::Handle->new(), IO::Handle->new(), IO::Handle->new(), IO::Handle->new(), ); my $handles = GnuPG::Handles->new ( stdin => $stdin_fh, stdout => $stdout_fh, stderr => $stderr_fh, status => $status_fh ); my $pid = $GnuPG->wrap_call( commands => [qw{--with-colons}], command_args => [qw{--no-options --no-default-keyring --fast-list-mode}], handles => $handles ); print $stdin_fh $key; close($stdin_fh); my $stdout = join '', <$stdout_fh>; close($stdout_fh); my $stderr = join '', <$stderr_fh>; close($stderr_fh); my $status = join '', <$status_fh>; close($status_fh); waitpid $pid, 0; ($stderr eq '') or cluck("GnuPG returned something in stderr: '$stderr' when checking key '$key'; skipping\n"), next; ($status eq '') or cluck("GnuPG returned something in status '$status' when checking key '$key': So what?\n"); my @included_keys = $stdout =~ /^pub:.*$/mg; (scalar @included_keys >= 2) && cluck ("Cannot handle more than one key per block correctlye yet. Found ".(scalar @included_keys)." in one block from ".$remailer->{'address'}); for my $included_key (@included_keys) { my ($type, $keyid, $uid) = $included_key =~ /pub::\d+:(\d+):([0-9A-F]+):[^:]+:[^:]*:::([^:]+):/; (defined $uid) or cluck ("Unexpected format of '$included_key' by ".$remailer->{'address'}."; Skipping"), next; my ($address) = $uid =~ /<(.*?)>/; $cypherpunk{$keyid} = { address => $address, type => $type, key => $key # FIXME handle more than one key per block correctly }; }; }; for my $keyid (keys %cypherpunk) { my $remailer_address = $cypherpunk{$keyid}->{'address'}; if ($remailer->{'address'} ne $remailer_address) { # Address mismatch -> Ignore reply and add $remailer_address to prospective addresses cluck("Remailer address mismatch $remailer->{'address'} vs $remailer_address id key $keyid. Adding latter to prospective remailers."); Echolot::Globals::get()->{'storage'}->add_prospective_address($remailer_address, 'self-capsstring-key', $remailer_address); } else { Echolot::Globals::get()->{'storage'}->restore_ttl( $remailer->{'address'} ); # 1 .. RSA # 17 .. DSA if ($cypherpunk{$keyid}->{'type'} == 1 || $cypherpunk{$keyid}->{'type'} == 17 ) { Echolot::Globals::get()->{'storage'}->set_key( (($cypherpunk{$keyid}->{'type'} == 1) ? 'cpunk-rsa' : (($cypherpunk{$keyid}->{'type'} == 17) ? 'cpunk-dsa' : 'ERROR')), $keyid, # as nick $cypherpunk{$keyid}->{'address'}, $cypherpunk{$keyid}->{'key'}, $keyid, 'N/A', 'N/A', 'N/A', $time); } else { cluck("$keyid from $remailer_address has algoid ".$cypherpunk{$keyid}->{'type'}.". Cannot handle those."); }; } }; return 1; }; sub remailer_key($$$) { my ($reply, $token, $time) = @_; $reply =~ s/^- -/-/gm; # PGP Signed messages my ($id) = $token =~ /^key\.(\d+)$/; (defined $id) or cluck ("Returned token '$token' has no id at all"), return 0; my $remailer = Echolot::Globals::get()->{'storage'}->get_address_by_id($id); cluck("No remailer found for id '$id'"), return 0 unless defined $remailer; parse_mix_key($reply, $time, $remailer); parse_cpunk_key($reply, $time, $remailer); return 1; }; sub remailer_stats($$$) { my ($conf, $token, $time) = @_; #print "Remailer stats\n"; }; sub remailer_help($$$) { my ($conf, $token, $time) = @_; #print "Remailer help\n"; }; 1; # vim: set ts=4 shiftwidth=4: